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The Covalent Bond and Molecular Compounds

Explore the concept of covalent bonds and molecular compounds, including types of bonds, diatomic molecules, and molecular formulas. Learn about structural formulas and the properties of covalent bonds.

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The Covalent Bond and Molecular Compounds

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  1. The Covalent Bond and Molecular Compounds Chemistry Mrs. Coyle

  2. The Periodic Table and Atomic Radius

  3. Types of Bonds • Ionic • Metallic • Covalent

  4. The Covalent Bond • The bond in which atoms are held together by their mutual electrical attraction for shared electrons. Fluorine

  5. Movie Clip • http://www.youtube.com/watch?v=Kj3o0XvhVqQ&NR=1

  6. The Covalent Bond • A single covalent bond is made up of two electrons. • The covalent bond is represented using a straight line. F — F F F

  7. Molecule • A neutral group of atoms joined together by covalent bonds.

  8. Diatomic Molecules • Molecules made up of two atoms. • There are 7 diatomic molecules. • H2, N2, O2, F2, Cl2, Br2, I2

  9. Hydrogen H· + ·H  H:H Hydrogen Hydrogen Hydrogen Atom Atom molecule • The hydrogen molecule has a single covalent bond. • The electronegativity of each hydrogenatom is the same, so the electrons are shared. Shared electron pair

  10. Molecular Compounds • Compounds comprised of molecules.

  11. Molecular Formula • A molecular formula is a chemical formula that is used for molecular compounds. • It shows the types and number of atoms in a molecule. • Note that ionic compounds used the chemical formula called the formula unit. • A molecular formula does not give information about the molecules structure.

  12. Structural Formula • Structural formulas show the arrangement of atoms in a molecule. • In a structural formula, the electron pair is represented by a line • Example: H-H (single bond: one pair of electrons)

  13. Space Filling Model Methane CH4

  14. Ball and Stick Models Ethane C2H6

  15. The Water Molecule •

  16. The Ammonia Molecule . NH3

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